Just installed my Berk HFC to go along with my Invidia Q300 CBE on my 08 G35 sedan. This is an awesome combination. Sounds amazing. Deep note with no rasp. Lots of power up in the high rpm's. No drone when cruising. But once you put your foot down its a whole new ball game. Sound is superb. Exotic car like. I would recommend Berk hfc's to anyone who wants a deeper exhaust note with no rasp.